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7
RX-DT505
RX-DT505
m SCHEMATIC DIAGRAM etunerico cIRUIT (Pars list on pages 67~73,)
1
2
3
4
5
6
7
8
9
10
A | TUNER
CIRCUIT
aig
Qig
Q4
ey uae nat et
2SC33IIRTA
A
MUTING
OPTICAL
PICKUP
3
So
Q18
Q20
ro)
RVTDTAI43XST
=
eniveane
SWITCHING
5
"ous
(ST / MONO)
cs2
el
O18
(1)
—
RVITA7358FT
it
FM FRONT END
© MUTE B
ty
uch
our
a
pe
é
to PIconnec Tori)
—
@ Ben Oe
CIRCUIT(CS22)
R447
»(5.
k
en
Saige
ds b
may
8} TUNER +8 | (Page 28)
oN
2
<OTVNAS
pF
Fy
re GNO
Se
3 1S
R63
ae
Ine
VV
F
COD
iy
B
ST
Pepetes3
|
ce
xltor
'a
2
pee
G) +804)
~ ~T ilts
<0.7V)Nbs
L$
eect]
ima
4
=E
a
=
328
2!
25C33 13BTA
y
i oF
ails
o
2
ew
9
iV!
"8T 33
Se
ai
oS
FM IF AMP
all
reg St
ese
Co
7]
*
oo
,
oe
88
an hw
RVTDTAI43XST
TELESCOPIC
aelq!
I:
ic2
>
POWER
SUPPLY
ANTENNA
so
TABIZ2AFET
ia
+
ral
FM /AM
IF AMP, DET
gk
P
& AM OSC , MIX
eg e
i
I
~ 3
CPI
1
a
(1) TUNE
TRACKING
On
ee
O-O-®
hs
(2) Ravio
+8
oe
™~}
()
4.9V
Cc
ee
COIL
pao CNS
Tofconnectoni;)
2
Pt
cis
S/M
CIRCUIT (CSI2)
R20
R
2
eax
RIOOGF
e
(Page 28)
33K
83x
cod
pen
pee
©) PLL CL
se
<2.1V>
03
|
38
abe
a
2SCI674LTA
ares
a8
3
Ia
e56
'9
BUFFER
AMP
(8) Pui ce
=>
,
(FM OSC)
ESELE
my
rys
pa
Q13,14
i
ad
Fa
2SC33IIRTA
Qi, 12
"ivy
Ql
esiy>
LW/ MW SELECT
2SAIZO9ORTA
(5.2v)
LW/MW
SELECT
D
<5.1V QI2
<5.1v>
(5.2¥)
(5.2V)
=a
6
Be ZX
=
Qs
RVTDTAI43XST
SWITCHING
(LW
:ON)
ree
r29
470
479.-~=«
MAIGSTA
E
C69
M3300P
PLL
FREQUENCY
07.8
gs
SYNTHESIZER
¢23.—R2I
:
o>
3
=
S0VI
5.6K
2SC3311RTA
3
|
E
H
FM/LW/ MW
on
LOOP
FILTER
os
5
<a
>
=
e
Q9,10
3
2S8C331IRTA
OOK tosw;
2
OC-DC
CONVERTER
F
Notes:
<for Tuner circuit>
©CD voltage measurements are taken with electronics voltmeter.
=>
: FM Signal Line
emma
| FM OSC Signal Line
®No switches or VRs.
The negative terminal of the battery provides negative meter connection point.
i
LW/MW OSC Signal Line
aaa):
FM/LW/MW Vcap Control Signal Line
<for CD circuit>
(__
)...LW/MW
<
>...FM
((__
))...CD
eS701
: Rest switch.
'
CD Signal Line
eVR701
: Best eye adjustment VR.
eThis schematic diagram may be modified at any time with the development of new technology.
-21-
—22-
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